Easily setting numerical values for geometry, like Lightwave's Modeler does
You can edit the positions of single vertices using the properties panel which can be toggled by pressing [N], then under the item tab you can see the XYZ coordinates. You cannot see each verts position individually but you can change them all at once.
Another useful tip is that if you want to  bring a vert to the same plane of another you can select the verts you want to move, and then the one on the X Y or Z you want it to be, and set the transform pivot to active. Then just press [S] to scale the [X], [Y], or [Z] button that correlates and then 0.
(Will add example gifs soon)